2Wire 2701HG-B and Linksys WRT54G

I'm going to be purchasing a network camera sometime soon and I'd like to be able to view it when I'm away from home. I'm currently using a 2Wire 2701HG-B modem/wireless router. I do not have a static IP address so I need DDNS support in order to view my camera from outside of my home network. I have an extra Linksys WRT54G with DD-WRT installed on it that supports DDNS.

What do I need to do on the 2Wire and on the Linksys in order to have the Linksys act as the router, and the 2Wire act as the modem only? I know that I need to put the 2Wire into bridge mode, but is there anything else I need to do in addition to that?

I've pretty much got everything else handled, I just need to know how to make the 2Wire gateway act as the modem only and not the router.